torch.sin() - torch.cos() - v1.5.0

落日映苍穹つ 2023-02-17 14:52 32阅读 0赞

#  torch.sin() - torch.cos() - v1.5.0 #

**TORCH**  
[https://pytorch.org/docs/stable/torch.html][https_pytorch.org_docs_stable_torch.html]

**`torch.sin()` \- `torch.cos()` 的 `input (Tensor)` 都是弧度制数据，不是角度制数据。**

*  `torch.sin` (Python function, in `torch`)
 *  `torch.Tensor.sin` (Python method, in `torch.Tensor`)
 *  `torch.Tensor.sin_` (Python method, in `torch.Tensor`)
 *  `torch.sin(input, out=None)` \-> Tensor  
    Returns a new tensor with the sine of the elements of input.  
    返回一个新的张量 Tensor , 其元素是张量 input 元素的正弦。

out i = sin ⁡ ( input i ) \\text\{out\}\_\{i\} = \\sin(\\text\{input\}\_\{i\}) outi=sin(inputi)

## 1. Parameters ##

`input (Tensor)` – the input tensor.

`out (Tensor, optional)` – the output tensor.

## 2. Example ##

(pt-1.4_py-3.6) yongqiang@yongqiang:~$ python
    Python 3.6.10 |Anaconda, Inc.| (default, May  8 2020, 02:54:21)
    [GCC 7.3.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import torch
    >>> import numpy as np
    >>>
    >>> data = np.array([0, 1/2.0, 1, 3/2.0, 2])
    >>> data
    array([0. , 0.5, 1. , 1.5, 2. ])
    >>>
    >>> data = data * np.pi
    >>> data
    array([0.        , 1.57079633, 3.14159265, 4.71238898, 6.28318531])
    >>>
    >>> torch.sin(data)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: sin(): argument 'input' (position 1) must be Tensor, not numpy.ndarray
    >>>
    >>> torch.sin(torch.Tensor(data))
    tensor([ 0.0000e+00,  1.0000e+00, -8.7423e-08, -1.0000e+00,  1.7485e-07])
    >>> exit()
    (pt-1.4_py-3.6) yongqiang@yongqiang:~$

*  `torch.cos` (Python function, in `torch`)
 *  `torch.Tensor.cos` (Python method, in `torch.Tensor`)
 *  `torch.Tensor.cos_` (Python method, in `torch.Tensor`)
 *  `torch.cos(input, out=None)` \-> Tensor  
    Returns a new tensor with the cosine of the elements of input.

out i = cos ⁡ ( input i ) \\text\{out\}\_\{i\} = \\cos(\\text\{input\}\_\{i\}) outi=cos(inputi)

## 1. Parameters ##

`input (Tensor)` – the input tensor.

`out (Tensor, optional)` – the output tensor.

## 2. Example ##

(pt-1.4_py-3.6) yongqiang@yongqiang:~$ python
    Python 3.6.10 |Anaconda, Inc.| (default, May  8 2020, 02:54:21)
    [GCC 7.3.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import torch
    >>> import numpy as np
    >>>
    >>> data = np.array([0.0, 1/2.0, 1.0, 3/2.0, 2.0])
    >>> data
    array([0. , 0.5, 1. , 1.5, 2. ])
    >>>
    >>> data = data * np.pi
    >>> data
    array([0.        , 1.57079633, 3.14159265, 4.71238898, 6.28318531])
    >>>
    >>> torch.cos(torch.Tensor(data))
    tensor([ 1.0000e+00, -4.3711e-08, -1.0000e+00,  1.1925e-08,  1.0000e+00])
    >>>
    >>> torch.sin(torch.Tensor(data))
    tensor([ 0.0000e+00,  1.0000e+00, -8.7423e-08, -1.0000e+00,  1.7485e-07])
    >>>
    >>> exit()
    (pt-1.4_py-3.6) yongqiang@yongqiang:~$

[https_pytorch.org_docs_stable_torch.html]: https://pytorch.org/docs/stable/torch.html